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Home / Farm Tractors / John Deere Tractors / JD 4840

John Deere 4840 Tractor

The John Deere 4840 is a two-wheel drive row-crop tractor from Iron Horses series. This model was manufactured between 1978 and 1982. The JD 4840 driveline components: John Deere 6466 four-stroke six-cylinder direct injection turbocharged intercooled diesel engine and 8x4 full powershift transmission.

A 466 cubic inches (7.6 L) engine has a cylinder bore of 4.56" (116 mm), piston stroke of 4.75" (121 mm), and rated power of 200 hp (148.1 kW). The maximum travel speed (forward and reverse): 18.6 mph (29.9 km/h) / 6.4 mph (10.3 km/h).

The closed center hydraulic system used a pump with a flow of 23 gpm (87.1 lpm) gpm. The hydraulic pressure is 157 bar (2275 psi). The John Deere 4840 was equipped with a power steering system, differential hydraulic wet disc brakes, 11.00x16 or 16.5Lx16.1 front tires, and 18.4x38 or 18.4x42 rear tires. The wheelbase is 118.5 inches (3000 mm).

Engine
Engine Model John Deere 6466
Engine Type 4 Stroke six-cylinder direct injection turbocharged intercooled diesel
Number of Cylinders 6
Displacement, cu in (L) 466 (7.64)
Engine Bore, in (mm) 4.56 (116.0)
Engine Stroke, in (mm) 4.75 (121.0)
Aspiration Turbocharged
Rated Engine Power, hp (kW) 200.0 (148.1)
Rated Engine Speed, rpm 2200
Idle Speed, rpm 800-2400
Compression 15.5:1
Firing Order 1-5-3-6-2-4
Fuel System Direct injection
Air Cleaner Dual dry element
Fuel Tank Capacity, gal (L) 103.0 (390.0)
Oil Capacity, qts (L) 21.0 (19.9)
Coolant Capacity, qts (L) 40.0 (37.5)
Electrical System Rating, Volts 12
Charging System Alternator
Alternator Rating, Amps 90

Power Take-Off
PTO Operational Type Independent
PTO Horsepower, hp (kW) 180.0 (134.0)
PTO Clutch Hydraulic disc
PTO Speed, rpm 1000
PTO/Engine Speed, rpm 1000/2200

Transmission
Transmission Type Power Shift
Gearbox Type 8F/4R, Full powershift
Number of Forward Gears 8
Number of Reverse Gears 4
Clutch Type Wet disc
Oil Capacity, qts (L) 80.0 (75.7)
Maximum Forward Speed, mph (kph) 18.6 (29.9)
Maximum Reverse Speed, mph (kph) 6.4 (10.3)


Wheels and Tires
Drive Wheels 2WD 4x2
Steering Configuration Front steer
Steering System Power Steering
Brakes Type Differential hydraulic wet disc
Front Tire Size (Std) 11.0-16
Rear Tire Size (Std) 18.4-38
Front Tire Size (Opt) 16.5L-16.1
Rear Tire Size (Opt) 18.4-42
Front Tread Width, in (mm) 58-100 (1470-2540)
Rear Tread Width, in (mm) 60-131.5 (1520-3340)

Hydraulic System
Hydraulic System Type Closed center
Implement Pump Flow, gpm (Lpm) 23.0 (87.1)
Hydraulic Pressure, Bar (psi) 157 (2275)
Hydraulic Capacity, gal (L) 16.5 (62.5)
Number of Standard Remote Valves 2/3
3-Point Hitch Category 3/3N
Standard Lift Capacity at lift pin, lb (kg) 8295 (3760)
Upper Link Pin Diameter, in (mm) 31.75 (1.25)
Upper Link Hole Diameter, in (mm) 32.00 (1.26)
Lower Link Pin Diameter, in (mm) 36.58 (1.44)
Lower Link Hole Diameter, in (mm) 37.34 (1.47)
Lower Hitch Point Span (3/3N), in (mm) 964.95 (37.99) / 825 (32.5)
Width of Ball, in (mm) 45 (1.77)
Pin Centerline (Lower to Upper), in (mm) 685 (27.0)

Dimensions and Weight
Wheelbase, in (mm) 118.5 (3000)
Length, in (mm) 177 (4490)
Height (Cab), in (mm) 117 (2970)
Overall Width, in (mm) 96 (2430)
Ground Clearance, in (mm) 14.9 (370)
Front Axle Clearance, in (mm) 26 (660)
Turning Radius, in (mm) 162 (4100)
Shipping Weight, lb (kg) 14900 (6760)
Operating Weight, lb (kg) 18000 (8165)
Ballasted Weight, lb (kg) 20370 (9240)

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